From bad67a264183004283f4fa6883d594388eae711d Mon Sep 17 00:00:00 2001
From: Sean Wang <sean.wang@mediatek.com>
Date: Wed, 14 Jul 2021 04:16:01 +0800
Subject: [PATCH] mt76: mt7915: fix mgmt frame using unexpected bitrate
Git-commit: bad67a264183004283f4fa6883d594388eae711d
Patch-mainline: v5.16-rc1
References: git-fixes
Fix the current driver mgmt frame is not respecting the basic rates field
provided by the AP and then unconditionally is using the lowest (1 or 6
Mbps) rate.
For example, if the AP only supported basic rate {24, 36, 48, 54} Mbps,
mt7921 cannot send mgmt frame with the rate not in the group. So,
instead, we pick up the lowest basic rate the AP can support to send.
Fixes: e57b7901469f ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets")
Suggested-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 10 +++++-----
drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h | 2 --
2 files changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 4c17d1169108..dcee3a3890e5 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1053,15 +1053,15 @@ void mt7915_mac_write_txwi(struct mt7915_dev *dev, __le32 *txwi,
mt7915_mac_write_txwi_80211(dev, txwi, skb, key);
if (txwi[2] & cpu_to_le32(MT_TXD2_FIX_RATE)) {
- u16 rate;
+ u16 rate, mode;
/* hardware won't add HTC for mgmt/ctrl frame */
txwi[2] |= cpu_to_le32(MT_TXD2_HTC_VLD);
- if (mphy->chandef.chan->band == NL80211_BAND_5GHZ)
- rate = MT7915_5G_RATE_DEFAULT;
- else
- rate = MT7915_2G_RATE_DEFAULT;
+ rate = mt76_default_basic_rate(mphy, vif);
+ mode = rate >> 8;
+ rate &= GENMASK(7, 0);
+ rate |= FIELD_PREP(MT_TX_RATE_MODE, mode);
val = MT_TXD6_FIXED_BW |
FIELD_PREP(MT_TXD6_TX_RATE, rate);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 33be449309e0..a6b5b300d415 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -36,8 +36,6 @@
#define MT7915_CFEND_RATE_DEFAULT 0x49 /* OFDM 24M */
#define MT7915_CFEND_RATE_11B 0x03 /* 11B LP, 11M */
-#define MT7915_5G_RATE_DEFAULT 0x4b /* OFDM 6M */
-#define MT7915_2G_RATE_DEFAULT 0x0 /* CCK 1M */
#define MT7915_THERMAL_THROTTLE_MAX 100
--
2.26.2